Paul hellmich



. (No Model.)

P. HELLMIOH. BOILER FEEDER.

No. 519,709. Patented May 15,1894;

INVENTOH WITNESSES. I

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UNITED STATES PATENT OFFICE.

PAUL HELLMICH, OF BEUTHEN-ON-THE-ODER, GERMANY.

BOILER-FEEDER.

SPECIFICATION forming part of Letters Patent No. 519,709, dated May 15,1894.

Application filed May 6, 1893- Serial No. 473,206- (No model.)

To aZZwhom it may concern.-

Be it known that 1, PAUL HELLMICH, a subject of the King of Prussia,residing at Beuthen-on-the-Oder, in the Province of Silesia, Germany,have invented a certain new and useful Boiler-Feeder, of which thefollowing is a specification.

This invention relates to a novel feeding device for boilers, which isso constructed that water is supplied to the boiler from two reservoirssuspended at diiferent elevations, so that a uniform feed under avarying steam pressure may be obtained.

In the accompanying drawings: Figure 1 represents a verticallongitudinal section of my improved boiler feeder, showing it applied toa steam jet apparatus. Fig. 2 is a vertical cross section of Fig. 1;Fig. 3 a horizontal section on line no, 00,.Fig. 1; Fig. 4 a detailsection of the steam nozzle; Fig. 5 a plan thereof; Fig. 6 an elevationof the entire apparatus detached, and Fig. 7 an elevation of amodification of the suspending mechanism.

I have shown my improved feeding device applied to a boiler a, locatedabove the grate.

m, of a stove and provided with steam nozzles, so as to aidcombustion,but it is evident that my invention may be applied to a steamboiler generally, without regard to its function orspecificconstruction.

From a water vessel 12, suspended outside the stove, a feed pipe 0,leads to the boiler, while a second steam pipe d, ending in several jetnozzles 01, conducts the steam to the grate surface. The feed pipe 0, isprovided with a valve 0, and the steam pipe d, is provided with one orseveral valves (1 The water vessel 1), is suspended from a spring e,(Fig. 6) or from a weighted lever c, Fig. 7) so as to be in a state ofrepose when filled with a certain quantity of water. Through the vessel1), and through the partly flexible pipe 0, water is let into theboilerup to a certain height. The vessel, as it becomes heavier, descends alittle and at an empirical place, a pointer f, is arranged, which shows,by means of a water level indicator f that the water has reached theheight required in the boiler. The water levels in the vessel and in theboiler are then equally high, Fig. 6. During this time, the cock dremains closed. As soon as the steam develops in the boiler, it pressespart of the water from the boiler back into the vessel b, which becomesheavier and descends. The valve or valves d being now opened, the steamis allowed to flow in jets from the nozzles 01', to the grate m. Thusthe steam pressure upon the surface of the Water in the boilerdiminishes and when the water surfacein the boiler has become lower thanthat in the vessel 6, the water will flow from the latter into theboiler, until the ratio of pressure is re-established. According to thequantity of water escaping from the vessel b, the latter will growlighter and will be lifted by the spring e, or the weighted lever e.Thus the height of the water level in the vessel, and consequently thatin the 'boiler, will remain constant, or alter to but a very smallextent. This constancy is the more exact, the more careful the tensionof the spring e, or the ratio of the weighted lever e, has been adaptedto the Weight of the vessel and to the relatively decreasing height ofthe water level in the vessel.

With more extensive firings, it is of advantags-on account of thegreater steam pressure in the boiler-to arrange a second water vesselabove the vessel b, the water level of which is to be situated at acertain height above that of the boiler. This height is necessary inorder that on account of the greater development of the fire, the steamshould have the necessary back pressure. The second vessel b, isconnected to the boiler by a pipe 0 provided with valve 0 When startingthe apparatus, the vessel b, only, is placed into communication with theboiler in the manner already described. If during the operation, thewater is pressed over too vehemently from the boiler into the vessel,the vessel 1), is disconnected by closing the valve 0', and the vessel1), is connected by opening the valvec The pressure of a water columnbetween the two water levels/in the boiler and in the vessel b, will nowact against the steam pressure and according to the proportions ofpressure, the water will be exchanged between the boiler and the vessel12'.

If desired, the valve 0', of pipe 0, may be connected to the valve 0 ofpipe 0 so that as one valve is opened, the other valve is closed.

In order to protect the nozzles d, and to 5 keep the fuel at a certaindistance from the steam ports, the nozzles are covered with caps g,Figs. 4 and 5. If the steam jets would act direct upon the burning fuel,the favorable eifect of the jets upon the development of 1c the flameswould be somewhat diminished.

What I claim is- The combination of asteam boiler with two independentfeed water chambers movably suspended at difierent elevations, pipes c,0 of different lengths for separately connecting I 5 said chambers tothe boiler and cooks within said pipes, substantially as specified.

Signed at Breslau, Province of Silesia, Empire of Germany, this 21st dayof April, 1893.

PAUL HELLMIOH.

Witnesses:

AUGUST DUssWANGRo, EDUARD ERY,

